Observe™ Tuberculin PPD (Bovine)™

Packaging
Injection (vials), 1mg.

Dosage and Administration

• Single intradermal test. Give a single intradermal 0.1mL injection of Tuberculin PPD (Bovine) 1mg. The caudal fold is the site of choice. Clean the site thoroughly before injection. Test interpretation. The best results will be obtained by reading the test at 72 hours after injection. A palpable diffuse swelling of the caudal fold can be regarded as positive.
• Comparative test. Inject simultaneously 0.1mL of Tuberculin PPD (Bovine) 1mg and 0.1mL Tuberculin (Avian) intradermally into the other caudal fold. The comparative test may also be carried out by injecting 0.1mL of each of the 2 tuberculins into the skin of the neck in comparable sites about 10 cm apart. Before injecting, measure and record the skin thickness at the sites of injection with callipers graduated in mm. Test interpretation. Read the test 72 hours after injection. A positive reaction is indicated by an increase in the skin thickness, characterised by diffuse swelling.
• When the comparative test is out and the greater reaction is produced by Tuberculin PPD (Bovine) 1 mg, the disease is assumed to be of mammalian origin. However, a greater reaction at the site of injection of Tuberculin PPD (Avian) indicates that infection is due to either avian tuberculosis or Johne’s disease, depending on clinical signs.
• Retesting. In accordance with the Standard Definitions and Rules promulgated by the Standing committee on Agriculture, retests may be performed, using the same or an alternative site, not less than 60 days after the last injection of tuberculin. This applies irrespective of whether the previous test was an intradermal caudal fold test or a comparative test.

Additional Information

• Storage: Store at 2°C to 8°C (Refrigerate. Do not freeze.) Protect from light.
• Withdrawal: Nil
• Schedule: Nil